US 7,489,820 B1
System for measuring the surface geometry and surface evenness of flat products
Ulrich Muller, Monheim (Germany); Detlef Winter, Vordorf (Germany); Detlef Sonnenschein, Essen (Germany); Rudolf Stockmeyer, Langenfeld (Germany); and Gustav Peuker, Mönchenglad (Germany)
Assigned to VDEh-Betriebsforschungsinstitut GmbH, Dusseldorf (Germany)
Appl. No. 9/787,172
PCT Filed Sep. 07, 1999, PCT No. PCT/EP99/06594
§ 371(c)(1), (2), (4) Date Jun. 12, 2001,
PCT Pub. No. WO00/16040, PCT Pub. Date Mar. 23, 2000.
Claims priority of application No. 198 42 138 (DE), filed on Sep. 14, 1998.
Int. Cl. G06K 9/48 (2006.01)
U.S. Cl. 382—199  [72/9.1; 72/11.7; 72/37; 250/559.19; 356/432; 356/604; 382/141] 11 Claims
OG exemplary drawing
 
1. Method for measuring the geometry and surface evenness of one side of a first moving metal strip and for measuring the geometry and surface evenness of one side of a second moving metal strip comprising:
providing a moving first metal strip having a surface to be measured;
providing a light source and a transparency between said light source and said surface of said first metal strip;
producing a pattern on the surface of the first metal strip to be measured using said light source, wherein said light source produces a first pattern on the surface of the first metal strip with the aid of said transparency, viewing the pattern on said surface of said first metal strip with a camera;
determining the geometry and surface evenness of said surface of said first metal strip;
providing a moving second metal strip having a surface to be measured;
providing said light source and said transparency between said light source and said surface of said second metal strip;
producing a pattern on the surface of the second metal strip to be measured using said light source, wherein said light source produces a second pattern on the surface of the second metal strip with the aid of said transparency viewing the pattern on said surface of said second metal strip with a camera; and
determining the geometry and surface evenness of said second metal strip.